It's pretty well into the season for Arena now, and I thought I'd share some observations about the 2v2 bracket:
Firstly, when Blizzard stated they weren't going to balance around 2v2, they really meant it. Most of my Arena matches are incredibly one-sided; all-caster teams get pwned even before they run out of cooldowns, but all-plate teams will almost always come out on top (unless they're *really* terrible, anyway). Rather a different mindset to previous seasons where there was always a chance you could win.
Druids are as annoying as ever - if they can kite well, they can last for ages (or at least a good 10min after their partner dies, particularly in the Dalaran Sewers).
The rogue ability Smoke Bomb is incredibly annoying, as I'd predicted when Cataclysm was still in the beta stage - not only can you not target the enemy, your healer also cannot target you. Not brilliant when your Disengage cooldown isn't up and you're disarmed, although the next patch should help with that (when Deterrence no longer requires a melee weapon, meaning you can cast it while disarmed). It's also very difficult to tell where the smoke is, since there are no bright colours involved in the spell.
I'd really like to try some 3v3 at some point to see how balanced it is, but it's difficult to find a time when everyone is free. Plus, I'd have to figure out some new strats because I'd have new classes to deal with; my old 3v3 partners (rogue, mage and occasionally hunter to go along with my current pally partner) don't play any more.
Oh well, at least my gear is improving - 1 purple a week that I can even wear to raid is pretty hax considering!